138231241 has 4 divisors (see below), whose sum is σ = 138284800. Its totient is φ = 138177684.

The previous prime is 138231239. The next prime is 138231319. The reversal of 138231241 is 142132831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 142132831 = 853 ⋅166627.

It is a cyclic number.

It is not a de Polignac number, because 138231241 - 2¹ = 138231239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138231221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22701 + ... + 28138.

It is an arithmetic number, because the mean of its divisors is an integer number (34571200).

Almost surely, 2^138231241 is an apocalyptic number.

It is an amenable number.

138231241 is a deficient number, since it is larger than the sum of its proper divisors (53559).

138231241 is an equidigital number, since it uses as much as digits as its factorization.

138231241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53558.

The product of its digits is 1152, while the sum is 25.

The square root of 138231241 is about 11757.1782754197. The cubic root of 138231241 is about 517.0534048368.

It can be divided in two parts, 1382 and 31241, that added together give a palindrome (32623).

The spelling of 138231241 in words is "one hundred thirty-eight million, two hundred thirty-one thousand, two hundred forty-one".